Wow am I exhausted!
Delivered 4 boxes and two bags of books to the Women's Prison Book Project (thanx to magenta for the tip). I estimate about 300 books, all in the non-fsf category. The huge tippy pile of books at the top of the stairs is gone and there are even 2 or 3 half empty shelves! Vast amounts of dust was vacuumed up, and at least 3 bookcases in this house now have no double stacked books.
Not only that, I found three books I have been trying to find for years! And two books belonging to other people, one of which I have returned.
I'm not sure why this was such exhausting work. I guess a lot of bending and reaching, getting up and getting down, and running up and down stairs looking for vacuum cleaner attachments and empty boxes.
Any way, a good weekend's work.